Controlled Release Compound Based on Metanilate-Layered Double Hydroxide Nanohybrid
Metanilate-layered double hydroxide nanohybrid compound was synthesized for controlled release purposes through co-precipitation method of the metal cations and organic anion. The effect of various divalent metal cations (M2+), namely Zn2+, Mg2+ and Ca2+ on the formation of metanilate-LDH nanohybrid...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English English |
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American Scientific Publishers
2008
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| Online Access: | http://psasir.upm.edu.my/id/eprint/5691/ http://psasir.upm.edu.my/id/eprint/5691/1/Controlled%20Release%20Compound%20Based%20on%20Metanilate.pdf |
| _version_ | 1848840170009264128 |
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| author | Hussein, Mohd Zobir Mat Nasir, Norashikin Yahaya, Asmah |
| author_facet | Hussein, Mohd Zobir Mat Nasir, Norashikin Yahaya, Asmah |
| author_sort | Hussein, Mohd Zobir |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Metanilate-layered double hydroxide nanohybrid compound was synthesized for controlled release purposes through co-precipitation method of the metal cations and organic anion. The effect of various divalent metal cations (M2+), namely Zn2+, Mg2+ and Ca2+ on the formation of metanilate-LDH nanohybrids, in which metanilate anion was intercalated into three different layered double hydroxide (LDH) systems; Zn-Al, Mg-Al and Ca-Al were investigated. The syntheses were carried out with M2+ to Al3+ initial molar ratio, R of 4. The pH of the mother liquor was maintained at pH 7.5 and 10 during the synthesis, and the resulting mixture was aged at around 70 °C for about 18 h. The intercalation of metanilate anion into the host was found to be strongly influenced by the M2+ that formed the inorganic metal hydroxide layers. Under our experimental condition, the formation of the nanohybrid materials was found to be more feasible for the Zn-Al than for the other two systems, in which the former showed well-ordered layered organic-inorganic nanohybrid structure with good crystallinity. Intercalation is confirmed by the expansion of the interlayer spacing to about 15-17 Å when metanilate was introduced into the interlamellae of Zn-Al LDHs. In addition, CHNS and FTIR analyses also support that metanilate anion has been successfully intercalated into the interlamellae of the inorganic LDH. Apart from M2+, this study also shows that the initial pH of the mother liquor plays an important role in determining the physicochemical properties of the resulting nanohybrids, especially the mole fraction of the Zn2+ substituted by the Al3+ ion in the LDH inorganic sheets which in turn controlled the loading percentage of the organic anion, surface properties and the true density. Preliminary study shows that LDH can be used to host beneficial guests, active agent with controlled release capability of the guests. Generally the overall process is governed by pseudo second order kinetic but for the first 180 min, the release process can be slightly better described by parabolic diffusion than the other models.
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| first_indexed | 2025-11-15T07:23:05Z |
| format | Article |
| id | upm-5691 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T07:23:05Z |
| publishDate | 2008 |
| publisher | American Scientific Publishers |
| recordtype | eprints |
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| spelling | upm-56912015-09-17T00:53:10Z http://psasir.upm.edu.my/id/eprint/5691/ Controlled Release Compound Based on Metanilate-Layered Double Hydroxide Nanohybrid Hussein, Mohd Zobir Mat Nasir, Norashikin Yahaya, Asmah Metanilate-layered double hydroxide nanohybrid compound was synthesized for controlled release purposes through co-precipitation method of the metal cations and organic anion. The effect of various divalent metal cations (M2+), namely Zn2+, Mg2+ and Ca2+ on the formation of metanilate-LDH nanohybrids, in which metanilate anion was intercalated into three different layered double hydroxide (LDH) systems; Zn-Al, Mg-Al and Ca-Al were investigated. The syntheses were carried out with M2+ to Al3+ initial molar ratio, R of 4. The pH of the mother liquor was maintained at pH 7.5 and 10 during the synthesis, and the resulting mixture was aged at around 70 °C for about 18 h. The intercalation of metanilate anion into the host was found to be strongly influenced by the M2+ that formed the inorganic metal hydroxide layers. Under our experimental condition, the formation of the nanohybrid materials was found to be more feasible for the Zn-Al than for the other two systems, in which the former showed well-ordered layered organic-inorganic nanohybrid structure with good crystallinity. Intercalation is confirmed by the expansion of the interlayer spacing to about 15-17 Å when metanilate was introduced into the interlamellae of Zn-Al LDHs. In addition, CHNS and FTIR analyses also support that metanilate anion has been successfully intercalated into the interlamellae of the inorganic LDH. Apart from M2+, this study also shows that the initial pH of the mother liquor plays an important role in determining the physicochemical properties of the resulting nanohybrids, especially the mole fraction of the Zn2+ substituted by the Al3+ ion in the LDH inorganic sheets which in turn controlled the loading percentage of the organic anion, surface properties and the true density. Preliminary study shows that LDH can be used to host beneficial guests, active agent with controlled release capability of the guests. Generally the overall process is governed by pseudo second order kinetic but for the first 180 min, the release process can be slightly better described by parabolic diffusion than the other models. American Scientific Publishers 2008 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/5691/1/Controlled%20Release%20Compound%20Based%20on%20Metanilate.pdf Hussein, Mohd Zobir and Mat Nasir, Norashikin and Yahaya, Asmah (2008) Controlled Release Compound Based on Metanilate-Layered Double Hydroxide Nanohybrid. Journal of Nanoscience and Nanotechnology, 8 (11). pp. 5921-5928. ISSN 1533-4880 http://dx.doi.org/10.1166/jnn.2008.252 10.1166/jnn.2008.252 English |
| spellingShingle | Hussein, Mohd Zobir Mat Nasir, Norashikin Yahaya, Asmah Controlled Release Compound Based on Metanilate-Layered Double Hydroxide Nanohybrid |
| title | Controlled Release Compound Based on Metanilate-Layered Double Hydroxide Nanohybrid |
| title_full | Controlled Release Compound Based on Metanilate-Layered Double Hydroxide Nanohybrid |
| title_fullStr | Controlled Release Compound Based on Metanilate-Layered Double Hydroxide Nanohybrid |
| title_full_unstemmed | Controlled Release Compound Based on Metanilate-Layered Double Hydroxide Nanohybrid |
| title_short | Controlled Release Compound Based on Metanilate-Layered Double Hydroxide Nanohybrid |
| title_sort | controlled release compound based on metanilate-layered double hydroxide nanohybrid |
| url | http://psasir.upm.edu.my/id/eprint/5691/ http://psasir.upm.edu.my/id/eprint/5691/ http://psasir.upm.edu.my/id/eprint/5691/ http://psasir.upm.edu.my/id/eprint/5691/1/Controlled%20Release%20Compound%20Based%20on%20Metanilate.pdf |